Disclosed is an organic light emitting diode display device capable of transmitting a sensing value through an EPI interface without a separate line B-LVDS including a display panel having a plurality of gate lines and data lines, a timing controller for controlling an operation timing of each pixel, a gate driver for driving gate lines, a data driver having a plurality of data driving ICs for driving data lines, and an EPI interface between the timing controller and each data driving ICs and for transmitting video/control data signal from the timing controller to each data driving IC, and transmitting a sensing value from the data driving IC to the timing controller.